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Preface
ABOUT THIS MANUAL
This manual contains the following:
Preface:
Conventions and definitions used in this manual, and how to
get update and suggest enhancements
Introduction:
Product/series overview, system requirements, and software
installation
Getting Started:
How to enter and exit the program, select menu options, and
enter information
Inventory Management:
Add or remove inventory, edit a record, search records by
weapon type, and record weapon sales
Accessory Management:
Add or remove inventory, edit a record, and search for
accessories by weapon
Support Databases:
Edit or Add to the Weapon Type, Manufacturer and Model
databases
Update User Information:
Your name and address for use on Bills of Sale and reports,
and value reference assignments
Reports:
Print inventory reports in a variety of formats, sales
reports, Bills of Sale, and accessory inventory reports<R>
CONVENTIONS AND DEFINITIONS
Prompts and Keys
C: Represents the prompt on your system if you are working on
your hard drive. This prompt may be different, depending on how
you set up your computer.
Arrow Keys
Positions the cursor on the screen. These keys are labeled with
up, down, right, and left pointing arrows. They may be a cluster
of four keys, or as part of the numeric keypad, or both.
<CR>
Press carriage return key (typically labeled Return or Enter).
Esc
Press the key labeled Esc or Escape.
Terms
Cursor
A graphic symbol on your display indicating the current typing
position. This could be a solid or flashing underline or block,
or other symbol depending on how your system is configured.
Database
A database is a collection of information. Databases are
composed of a series of records, each with an identical
structure.
Display
The monitor on your computer system.
Field
A single piece of information in a database record, such as a
serial number, or weapon description.
Function
A menu choice that performs a particular operation, such as the
Add Inventory to Database function.
Menu
A list of choices where you select functions by entering the
associated option number or letter. A menu displays an
additional menu , data entry screen, chart, or graph.
Module
A set of related operations, all accessible from the main menu.
For example, the Collector's Report module.
Record
A record is a single entity composed of a series of fields, such
as all the information relating to a particular weapon (serial
number, type, description, etc.).
Screen
A data entry screen is where you type information.
UPDATES AND ENHANCEMENTS
Please return the registration card found in your package. If
there are problems in this program, we will send you updates at
no cost. By returning the registration card, we can also notify
you of any new program features or releases.
To report program bugs, suggest enhancements, or simply comment
on the programs or manuals, write to:
Peripheral Data Systems
15110 S.W. Boones Ferry Road, Suite 225 P.O. Box 1526
Lake Oswego , OR 97035
Attn: ArmsCalc Engineering
-----------------------------------------------------------------
Chapter 1 Introduction
-----------------------------------------------------------------
IN THIS CHAPTER
Overview
System Requirements
Software Installation
OVERVIEW
ArmsCalc
ArmsCalc is a comprehensive tool to estimate and graph how a
projectile will behave under predetermined circumstances. You
can graphically compare loads with different bullet types,
weights, charges, etc. for remaining energy and velocity,
elevation, trajectory, etc.
Results obtained from this program are mathematically correct,
but may differ from actual field testing. Many factors may be
unknown or unable to be calculated, but they still affect the
ballistics of a round. For example, the barrel length and twist
of rifling affects the stability of a round, while the exact
diameter of bore and bullets vary from weapon to weapon and round
to round, even within the same caliber.
ArmsCalc, used in conjunction with ArmsLoad, gives you the
ability to track actual performance of reloaded shells and make
accurate estimates of the bullet performance for different ranges
and conditions.
Note
ArmsCalc is a tool to be used to help you calculate and graph
ballistics values for various loads. It is the user's
responsibility to maintain safety levels for their particular
weapons. Peripheral Data Systems, ARMS, and ArmsCalc are not
responsible for the actual performance of any load. All weapons
should be inspected by a qualified gunsmith prior to use.
ArmsInv
ArmsInv is a comprehensive inventory and reporting system,
providing a convenient and entertaining means of cataloging the
collection, tracking individual items by weapon type, assigning
values and references, and tracking associated accessories.
ArmsInv also provides a complete audit trail of any weapon you
may sell. It generates a Bill of Sale, and keeps a history of
that weapon, such as when and where you purchased it, cost,
serial number, when and who you sold it to, price, and net
profit/loss.
ArmsLoad
ArmsLoad is a comprehensive database designed to help both the
avid and novice reloader to track and catalog loads of their own
manufacture or others. By documenting the process and
components, you can manufacture ammunition of a consistent high
quality.
ArmsLoad can help you easily track and evaluate the performance
of any given load for you and your weapon. No longer do you have
to wholly rely on statistics from a bullet manufacturer's test
rifle under controlled conditions.
ArmsLoad, used in conjunction with ArmsCalc, gives you the
ability to track actual performance and make accurate estimates
of the bullet performance for different ranges and conditions.
SYSTEM REQUIREMENTS
ArmsCalc requires an IBM PC or compatible, equipped with the
following:
MS DOS or PC DOS 3.3 or higher
640 Kb RAM
A config.sys file with BUFFERS=32 and FILES=40
The Statement "SET CLIPPER=F40" in your Autoexec.bat file
Either a 10Mb (or larger) hard drive
CGA, EGA, VGA, or Hercules monochrome graphics cards are
required to display any of the graphs
EGA, VGA, or Hercules monochrome graphics cards are required
to display graphs in the four graph format
SOFTWARE INSTALLATION
This section covers two possible installations:
Follow these instructions for installing one or multiple Arms
programs on your hard drive.
It is not recommended to try to run ArmsCalc, ArmsInv or ArmsLoad
on a floppy disk based system unless you do so with 1.2mb or
720/1.4mb diskettes.
To install on a hard disk drive we suggest you follow the
following procedure.
AUTOMATIC INSTALL
Insert the ARMS program of choice in your A: drive and enter
A:INSTALL <CR>. The commands to run any of the ARMS programs are
ARMSCALC <CR>, ARMSLOAD <CR> and or ARMSLOAD <CR>. Refer to
Chapter 2 Getting Started for more information.
MANUAL INSTALL
Insert the ARMS program of choice in drive A: and create a sub
directory on your C: drive.
At the C:/ prompt enter MD\ARMS <CR> then enter CD\ARMS <CR>
Copy the archive file from the floppy drive to the hard drive by
typing, copy a:*.* <CR>
Repeat for as many ARMS programs as you have.
To un-archive the ARMS programs enter ACALC <CR>, AINV <CR> and
or ALOAD <CR>.
At this time delete the archive files as they only take up disk
space and you still have them on the floppy diskettes. You may
do this by entering DEL ACALC.EXE <CR>, DEL AINV.EXE <CR> and or
DEL ALOAD.EXE <CR>.
To run any of the ARMS programs you must make sure your
config.sys includes FILES=40 and BUFFERS=32 and your autoexec.bat
includes SET CLIPPER=F40
The commands to run any of the ARMS programs are ARMCALC <CR>,
ARMSINV <CR> and or ARMSLOAD <CR>.
Refer to Chapter 2 Getting Started for more
information.
-----------------------------------------------------------------
Chapter 2 Getting Started
-----------------------------------------------------------------
In This Chapter
Entering ArmsCalc
ArmsCalc Main Menu
Selecting Menu Options
Returning to the Previous Menu
Entering Information
Exiting ArmsCalc
ENTERING ARMSCALC
Once you have installed ArmsCalc, as described in Chapter 1
Installing ArmsCalc, you are ready to begin.
1. Connect to the appropriate directory: CD\ARMS
2. Type: ARMSCALC <CR>
If everything is set up and installed correctly, you are
prompted to enter any key to begin.
The ArmsCalc main menu is displayed. If the menu does not
appear, repeat the instructions in Chapter 1 Installing
ArmsCalc.
ARMSCALC MAIN MENU
The ArmsCalc main menu provides easy access to the major features
of the program: Ballistic Coefficients, Projectile
Energy/Velocity, USPSA / IPSC Ratings and Recoil, Shotgun Recoil,
Ballistics Calculator, Ballistic Defaults, and Support Databases.
Each of these items takes you to another menu, a data entry
screen, or displays a list of values. These options are all
detailed in the following chapters. The final option returns you
to the computer's operating system.
Selecting Menu Options
To select a menu option, simply type in the option number or use
the up-down arrow keys to highlight and press <CR>. For example,
to enter the Inventory Management option, type: 1 <CR>
Returning to the Previous Menu
There are two ways to return to the previous menu:
1. If you are at a menu, select the option Return to Main Menu
<CR>. 2. If you are at a data entry screen, press Ctrl_W or Esc.
Entering Information
To enter information, position your cursor (with the arrow keys)
to the appropriate field and start typing. When you finish
adding information in a field, you may have to press <CR> to move
to the next field. When you completely fill in a field, you are
automatically advanced to the next field. You can return to a
previous field by pressing the Left arrow key.
You can also move the cursor within a field to add or correct
existing information, without retyping the entire line.
Many of the fields on the data entry screen contain sample data.
When you type in new information, it replaces any information
displayed in that field. Be sure to type over or delete all
extraneous characters in a field.
When you have entered all the information you want to on a
particular screen, press the Ctrl key and W key (Ctrl_W) at the
same time to bring up the Save screen.
Exiting ArmsCalc
To exit ArmsCalc, select the option Exit to DOS.
-----------------------------------------------------------------
Chapter 3 Ballistic Coefficients
-----------------------------------------------------------------
BALLISTIC COEFFICIENTS
Selecting 1 from the Ballistic's Main Menu displays the Ballistic
Coefficient's Main Menu. The following functions are available
from this menu.
Read Coefficient File
Edit Coefficient File
Calculate Ballistic Coefficient
Return to Main Menu
Select 1 <CR> from the Ballistics Main Menu to display ballistic
coefficients for commercial bullets.
The ballistic coefficient is the ratio of the sectional density
to the form of a projectile. This ratio reflects to what degree
a projectile maintains its velocity.
ArmsCalc uses the ballistic coefficient as one factor in
calculating remaining velocity and energy, time of flight, bullet
drop, elevation, and height above the line of sight. Other
factors for these calculations include line of sight above bore,
wind speed, wind direction, and range.
When you enter this function, you are prompted to enter 1 to View
the coefficients, or 2 to Edit the coefficients.
The following abbreviations are used in the ballistic coefficient
chart:
Brand:
R Remington
W Winchester
F Federal
Type:
P Pointed
S Semi Pointed
R Round Nose
F Flat Nose
SWC Semi Wadcutter
HP Hollow Point
SP Soft Point
SX Special Expanding
FJ Full Metal Jacket
BT Boattail
LD Lead
It displays the caliber, brand, bullet weight (grains), bullet
type, and the ballistic coefficient. If you are using the View feature, use the arrow keys to scroll
through the file, and Esc to return to the menu.
If you are using the Edit feature:
Note
In addition to the Edit feature, the ballistic coefficients
are stored in a file named COE.TXT This is a text file that
can be edited at the DOS level, so you can add or delete
ballistic coefficients. Before editing the file, be sure
you have a backup of the original.
If you edit this file, be sure and save it as a plain text
file, not in a word processor proprietary format.
CALCULATE BALLISTIC COEFFICIENT
Select 3 <CR> from the Ballistics Main Menu to compute the
coefficient of a bullet from known data. The coefficient
calculators screen is displayed.
To calculate a coefficient enter data into the following
fields:
Elevation
Feet above sea level you are firing this load.
Barometric Pressure
The barometer reading at the time of firing.
Temperature
The temperature at the time of firing
Relative Humidity
The humidity percentage at the time of firing. Relative ATM
Density and Relative Sonic Velocity are computer from the
atmospheric conditions just entered.
Cartridge Description
Information to identify this round (35 Whelen / reload 1).
Distance to First Screen Pair (FT)
The distance from the muzzle to the first pair of
chronograph screens.
Distance to Second Screen Pair (FT)
The distance from the muzzle to the second pair of
chronograph screens.
Velocity at First Screen Pair
Chronograph reading for the first screen pair.
Velocity at Second Screen Pair
Chronograph reading for the second screen pair. Median
Velocity, the Ballistic Coefficient at both Standard Metro
and your actual atmospheric conditions are computed. The
Coefficient at Standard Metro is what should be recorded
since the Ballistic Calculator will adjust for your actual
metro conditions. ----------------------------------------------------------------
Chapter 4 Projectile Energy and Velocity
-----------------------------------------------------------------
When you select 2 <CR> from the Ballistic Calculator Main Menu
the Projectile Energy & Velocity menu is displayed. The
following functions are available on this menu.
Energy / Velocity Relationship
Correct Muzzle Velocity from Chronograph
Return to Main Menu
PROJECTILE ENERGY CALCULATOR
The projectile energy calculator is displayed when you select
option 1 <CR> from the Energy & Velocity menu.
This calculator has two functions:
1. Calculates the energy of a projectile based on its
velocity and mass
2. Calculates the velocity of a projectile based on its
energy and mass
To calculate the energy (feet-per-pounds), enter the velocity
(feet-per-second) and mass (grains) of the projectile. When
these fields are completed, the energy for that combination is
displayed. To skip this calculation, simply press <CR> twice to
advance to the second line.
To calculate the velocity (feet-per-second), enter the energy
(feet-per-pounds) and mass (grains) of the projectile. When
these fields are completed, the velocity for that combination is
displayed. To skip this calculation, simply press <CR> twice to
advance to the end of the line.
When both calculations are complete, a prompt appears at the
bottom of the screen. Select either to calculate another
combination, or to return to the Ballistic's main menu.
CORRECT MUZZLE VELOCITY FROM CHRONOGRAPH
Selecting option 2 <CR> from the Energy & Velocity menu displays
the following notation.
This routine will determine the correct muzzle velocity from
raw screen data. You need to know the distance from the
muzzle to the first pair of screens, the distance between
the screens and the instrument velocity for this pair.
It is best to know the ballistic coefficient for the bullet
used, if not know the routine will try to determine the
coefficient for you.
Once the muzzle velocity is known, a more correct
coefficient may be calculated in the coefficient part of
this program.
Press any Key to Continue.
To calculate the correct muzzle velocity you need to know
distance from muzzle to first screen, distance between
screens, ballistic coefficient of the bullet and chronograph
velocity.
If the ballistic coefficient is not known you are prompted
to give a description of the bullet and ArmsCalc estimates
the coefficient.
After the data input, retardation is displayed and correct
muzzle velocity (instrument velocity + retardation) is
displayed.
-----------------------------------------------------------------
Chapter 5 USPSA/IPSC Ratings and Recoil
-----------------------------------------------------------------
USPSA/IPSC Ratings
The USPSA/IPSC Power Factors screen is displayed when you select
option 3 <CR> from the Ballistic's main menu. The power factor
is the bullet weight divided by 1000 and multiplied to the
velocity. It is used as a classification in IPSC competition. A
power factor of 125 through 174 is classified as minor, and a
factor over 175 is considered major. Power factors below 125 are
not allowed in IPSC competition.
Note
USPSA is the United States Practical Shooting Association,
IPSC is the International Practical Shooting Confederation.
To calculate the power factor, enter your data the following
fields:
Bullet Weight
The weight of the bullet in grains. Example: 23
Velocity
The muzzle velocity in feet-per-second. Example: 1025
When these fields are complete, the power factor is displayed.
You are prompted whether you wish to compute recoil. Enter Y to
continue to the recoil screen, or N to return to the Ballistic's
main menu.
RECOIL
If you selected Y, the recoil calculator is displayed. This
calculator is used for rifles and handguns. Refer to Chapter 6
Shotgun Recoil to compute the recoil for a shotgun.
To calculate the recoil, enter your data in the
following fields:
Smokeless or Black Powder
Choose between smokeless powder or black powder
Bullet Weight
The weight of the bullet in grains. Example: 230 This value
is carried over from the power factor screen. You can
change it if you are performing a different calculation.
Muzzle Velocity
The muzzle velocity in feet-per-second. Example: 1025 This
value is carried over from the power factor screen. You can
change it if you are performing a different calculation.
Charge Weight
The weight of the charge in grains. Example: 12.00
Gun Weight
The weight of the gun in pounds. Example: 5.0
When you have completed these fields, the recoil calculations are
displayed:
Recoil Impulse
The number of pounds of recoil felt. Specified in
pounds-per-second.
Free-Recoil Velocity
The backward movement of the gun after firing. Specified in
feet-per-second.
Free-Recoil Energy
The energy transmitted to the shoulder and hand after
firing. Specified in feet-per-pound.
You are prompted to compute another power factor and recoil, or
to return to the Ballistic's main menu.
-----------------------------------------------------------------
Chapter 6 Shotgun Recoil
-----------------------------------------------------------------
SHOTGUN RECOIL
The shotgun recoil calculator is displayed when you select option
4 <CR> from the Ballistic's main menu.
Note
The choke, stock design, and action mechanics all affect the
actual recoil of a shotgun. The shotgun recoil calculator
cannot mathematically take these factors into account when
computing recoil.
To calculate the shotgun recoil, enter your data in the following
fields:
Smokeless or Black Powder
Choose between smokeless powder or black powder
Shot Charge
The weight of the shot in ounces. Example: 1.25
Wad Weight
The weight of the wad in grains. Example: 40 If this value
is not known, use the chart on the screen as a substitute.
Muzzle Velocity
The muzzle velocity in feet-per-second. Example: 1100
Charge Weight
The weight of the charge in grains. Example: 21.00
Gun Weight
The weight of the gun in pounds. Example: 8.7
When you have completed these fields, the recoil calculations are
displayed:
Recoil Impulse
The number of pounds of recoil felt. Specified in
pounds-per-second.
Free-Recoil Velocity
The backward movement of the gun after firing. Specified in
feet-per-second.
Free-Recoil Energy
The energy transmitted to the shoulder and hand after
firing. Specified in feet-per-pound.
You are prompted to compute another recoil, or to return to the
Ballistic's main menu.
-----------------------------------------------------------------
Chapter 7 Ballistics Calculator
-----------------------------------------------------------------
When you first enter the ballistics calculator, option 5 <CR>
from the Ballistic's main menu, a reminder screen is displayed.
The ballistics calculator module and the graphs module can be
used two ways:
1. Calculate and optionally graph one load
2. Calculate and optionally graph two or three loads
Operationally, if you are only interested in one load, you must
choose Return to the Main Menu after you graph the load, in order
to clear out the load memory. If you are interested in multiple
loads, you would choose Compute Values for Another Round. Both
of these options are detailed in Chapter 8 Graphs.
BALLISTICS CALCULATOR
The ballistics calculator is designed to compute data from
several databases.
Averaged Factory Loads
Load data supplied by ammunition manufacturers, choose the
description that matches your factory ammunition.
Reload Bullet Specifications
Bullets by manufacturer, data includes ballistic
coefficients given for different velocities and adjusts
coefficients given as International Metro to Standard
Metro.
ArmsLoad Database
Load data you have entered into the ArmsLoad database.
Default Data
Your "favorite" load you wish to use as a comparison.
Select one of the options from the option menu screen. If
Default is chosen the ballistics calculator is displayed. Any
other choice will open the appropriate database and you are
prompted to give a description of your desired load. Use the
arrow keys to scroll through the database and press <CR> to
select. The calculator appears with most fields pre-input for
you.
Muzzle energy, relative stopping power (RSP), and sectional
density of the projectile are calculated from the second, third,
fourth and fifth fields.
Caliber
The bullet caliber. You can include manufacturer for your
own information. Example: 35 WHELEN
Bullet Weight
The weight of the bullet in grains. Example: 250
Muzzle Velocity
The velocity in feet-per-second. Example: 2450
Bullet Type
A code number between 1 and 12, representing the type of
bullet. The code number and values are displayed at the top
of the screen and are only used in computing RSP (relative
stopping power) and has no affect on any other calculations.
Bullet Diameter
The diameter of the bullet in inches. Example: .357
Ballistic Coefficient
Computed for average factory loads. Carried forward from
default, ArmsLoad database and reload bullet specifications.
If using other data you need to enter the correct
coefficient. This number cannot equal 0.
Height of Sight above Bore
The height of your sight above the bore, in inches. Example:
1.25 If you are performing calculations for a second or
third load, this number is carried over from the first load.
It can be changed if you are using a different calculation.
Wind Speed
The speed of the wind in miles-per-hour. Example: 5
Wind Direction
The direction of the wind, where 12 o'clock is a head wind,
3 and 9 o'clock are direct cross winds, and 6 o'clock is a
tail wind. Direction affects velocity.
Range
The range of the target in yards. Example: 200 If you are
performing calculations for a second or third load, this
number is carried over from the first load. It can be
changed if you are using a different calculation.
Up/Downhill Angle
Enter in degrees. The calculator computes point of impact
according to a level line of fire and angle of fire.
Example: 15 (15 degrees)
Point Blank Range
Vertical size of target, point blank range is computed off
of zero range. Example: 12 (12 inches)
Elevation
Feet above sea level you are firing this load.
Barometric Pressure
The barometer reading at the time of firing.
Temperature
The temperature at the time of firing
Relative Humidity
The humidity percentage at the time of firing The ballistics
calculator computes the approximate trajectory for
velocities between 1400 and 3600 feet-per-second. At close
range (25 to 50 yards) velocities as low as 800
feet-per-second should be accurate.
Note
Velocities under 1400 fps or over 3600 fps are
mathematically correct, but do not accurately reflect true
performance. When the fields are complete, you are asked if
you wish to compute Point Blank range, choosing to calculate
point blank range, calculates from the zero range forwards
and zero range outwards.
After the calculations are displayed, you can chart the
calculations, return to the Ballistic's main menu.
The following calculations are displayed:
Corrected COE
Adjusted Coefficient due to differences in Standard Metro
and Metro at time and place of firing.
Muzzle Energy
The energy the projectile has as it leaves the muzzle.
Specified in feet-per-pound
Remaining Energy
The energy remaining (feet-per-pound) after the projectile
reaches the given range.
RSP
The relative stopping power of the projectile, based on
mass, muzzle energy, and muzzle velocity. This number is
only meaningful when compared to other loads.
Sectional Density
The ratio of the bullet weight to the square of the bullet
diameter.
Corrected Muzzle Velocity
Correction in velocity (feet-per-second) due to changes in
metro and angle of wind.
Remaining Velocity
The velocity remaining (feet-per-second) after the
projectile reaches the given range.
Time of Flight
The number of seconds it takes the projectile to reach the
specified range after firing.
Bullet Drop
The number of inches the bullet drops during flight.
Elevation (MOA)
The elevation of the bullet at the given range. Specified
in Minutes of Angle (MOA), where 60 minutes equals 1 degree.
One MOA is approximately 1.047 inches.
Maximum Height above Line of Sight
This is the height (inches) of the projectile, in relation
to the line of sight, at the given range.
Cross Wind
Deflection (inches) caused by wind speed and direction.
Sight Correction Up/Downhill
Point of impact off zero due to uphill or downhill angle of
fire.
Point Blank Range
The distance in front of zero range and behind zero range
your projectile will hit within the target size given.
Note
As a reminder, you can always press Shift Print Screen on
your keyboard to make a screen copy of your data. You may
need to set your printer to print IBM's Extended Character
Set.
Printing the Load
You can print an extended version of the chart. This is the only
time you can print this load, unless you re-enter the ballistics
calculator with the same information.
Choose to print the load, send the data to a text file or going
to the graphs menu. After printing, the Graphs menu is
displayed.
Refer to Chapter 8 Graphs for details on ArmsCalc's graphing
capabilities.
-----------------------------------------------------------------
Chapter 8 Graphs
-----------------------------------------------------------------
GRAPHS MENU
The Graphs menu is only selectable after the ballistics
calculator has charted the data from an input load. The Graphs
menu is then displayed. The following functions are available on
this menu:
View Graphs of Ballistic Values at Point of Aim
Print Graphs of Ballistic Values at Point of Aim
View Graphs of Ballistic Values at Point of Aim X 2
Print Graphs of Ballistic Values at Point of Aim X 2
Export Data to a file (dBase delimited)
Compute Values for Another Round
Return to Main Menu
VIEW AND PRINT GRAPH OPTIONS
Selecting options 1, 2, 3, or 4 brings up the Ballistics Graphs
menu, The View and Print Graph options all access these graph
types, either at point of aim (options 1 and 2), or point of aim
X 2 (options 3 and 4). View displays the graph on your monitor,
Print sends the graph to your printer. There are ten different
graphs available:
Remaining Velocity
Remaining Energy
Bullet Drop
Time of Flight
Maximum Bullet Height
Wind Deflection
Trajectory
Up/Downhill Trajectory
Preffered Game Weight
Trajectory and Wind Drift
In addition to the menu, two print options each display
the Printer Selection Menu. You must first select a printer by
pressing F7, if your printer is not specifaclly listed it may be
able to emulate a supported printer.
Note
The following examples all graph a single load. The legend
displayed in the upper right corner of each graph provides
different colors or line types for up to three different
loads. In addition, some graphs also show a line of sight
and/or a reference line.
Refer to the section on Compute Values for Another Round in
this chapter for information and an example of graphing
multiple loads.
Remaining Velocity
Remaining Velocity is charted in thousands of
feet-per-second across the range in yards.
Remaining Energy
Remaining Energy is charted in thousands of feet-per-pound
across the range in yards.
Bullet Drop
Drop is charted in inches across the range in yards.
Time of Flight
Time is charted in seconds across the range in yards.
Maximum Bullet Height
Height is charted in inches across the range in yards. A
reference line is charted for comparison.
Wind Deflection
Deflection is charted in inches across the range in yards.
Trajectory
Trajectory is charted in inches of elevation across the
range in yards. The sight line is also charted for
comparison.
Up/Downhill Trajectory
Trajectory is charted in inches of elevation across the
range in yards. The sight line is also charted for
comparison.
Preffered Game Weight
The preffered weight of game is displayed acroos a range of
yards. This is not accuate if using small fragmenting varmit
bullets.
Trajectory and Wind Drift
Deflection is charted in inches across the range in yards
and illustrates the Trajectory for one load. Trajectory is
charted in inches of elevation across the range in yards.
The sight line is also charted for comparison. Both graphs
are displayed on one screen.
Export Data to a File
Graph option 5 <CR> allows export of computed data to a dBase
delimited file that can be imported into other programs (such as
a spread sheet). Fields exported are range, incremental data,
and load descriptions.
There are eight different graphs available:
Remaining Velocity
Remaining Energy
Bullet Drop
Time of Flight
Maximum Bullet Height
Wind Deflection
Trajectory
Up/Downhill Trajectory
Preffered Game Weight
Compute Values for Another Round
Graph option 6 <CR> can be used to return to the ballistics
calculator module to enter information for a second or third
load. This option is the only way to enter multiple loads. If
you exit to the Ballistic's main menu all of the values are
reset, and your existing loads lost.
Note
You do not have to immediately return to the ballistics
calculator. You can view, print or export any of the graphs
between each load.
Export Data
Send load data to a dBase delimeted file for use in your favorite
spreadsheet.
Return to Main Menu
Graphs option 7 <CR> returns you to the Ballistic's main menu.
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Chapter 9 Update Ballistic Defaults
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USER INFORMATION SCREEN
The User Information screen appears when you select option 3 <CR>
from the main menu. This is the only screen in this module.
Note
You must enter this information before you can compute
accurate data for your shooting.
Here is a brief description of the fields on the update user
information screen.
Cartridge Description
The caliber description. Example: 35 WHELEN
Bullet Weight
The weight of the bullet in grains. Example: 250
Bullet Diameter
The bullet diameter in inches. Example: .357
Ballistic Coefficient
The coefficient of the bullet used. Example: .244
Muzzle Velocity
The initial muzzle velocity in feet per second. Example
2450
Line of Sight Height
The difference between the sight line and the bore in
inches. Example: 1.50
Zero Range
The range or distance from the muzzle you wish to zero the
load in yards. Example: 200
Altitude
The elevation in feet, above sea level you are shooting.
Example: 95
Barometric Pressure
The barometric pressure when you shoot (obtainable from a
barometer or your local weather station). Example: 29.30
Temperature
The temperature in degrees F. when you are shooting.
Example: 68
Relative Humidity
The humidity percentage when you shoot (available from your
local weather station). Example: 65